# Mechanism Tests

| Mechanism | Model | Z_1 Coef | Z_1 p | Channel Coef | Channel p | N | R2 |
|---|---|---|---|---|---|---|---|
| A: Labor force channel | log(patents) + working_age_share | -11.0772 | 0.0105 | 7.6001 | 0.1499 | 1163 | -0.0314 |
| B: Human capital channel | log(patents) + human_capital | -8.7682 | 0.0096 | 0.8902 | 0.0176 | 1021 | 0.1331 |
| C: Age composition | log(patents) ~ old_dep + youth_dep | nan | nan | 6.0279 | 0.0029 | 1163 | -0.1339 |